Hi everyone
The Timber Guide approves 118x180 GL30cs with a free span of 4m, which is the depth of the deck.
Now I intend to use 118x180 impregnated ntr A glulam beam GL28h classified and it is missing in the timber guide's app for dimensioning help.
Question: Can a GL28h also handle a 4m free span equivalent to GL30cs?

Grateful for help
 
  • App screen showing beam dimension options and corresponding free length capacities, ranging from 4.15 m to 10.37 m for various GL28cs and GL30cs types.
  • Illustration of a timber beam setup for decking, showing measurements and options for spacing and length in a construction app interface.
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